互动封闭仿真课堂
1、智能交互 2、电子板书式视频教学 3、在线互动问答 4、封闭课堂启发式教学方式
随堂测试、知识梳理、易错点揭示、总结启迪智能错题本
听课中的错题能自动加入错题本,课后可方便复习及导出错题本升级服务
在线答疑、课后同类题练习、讲义下载、短信提醒23. The company has a free long-distance telephone number
______ customers may call with any questions they
have about its products.
A. so that B. although C. as D. even if
24. - How do you learn English so well?
- ______ it every day.
A. In speaking B. By speaking
C. With speaking D. On speaking
25.The engineer left the office angrily , _______ never to return again.
A. determines B. determining C. to determine D. determined